<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <p>{{counter}}</p>
    </div>
    <script src="..\vuerouter\node_modules\vue\dist\vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                counter: 1
            }
        })

        setInterval(() => {
            app.counter++
        }, 1000)
    </script>
</body>
</html>